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The Design Shop / Re: Scraper Blade Material
« Last post by Pete. on Today at 01:31:43 AM »
Hey Guys, thought I would ask the smartest group of guys I know for some advice. I've designed and had a floor scraping attachment made for our skidsteer. We have a large paintshop and when the fire commisioner came through last, he commented that we can't let the paint build up on the floor. So it's been about 2 years and the paint is about an inch thick, all types from enamels and epoxy's. The scraper attachment itself works great and the skidsteer can put enough pressure down to get under the paint, but I'm not sure what to try next for the actual blade. We had a bunch of QT100 plate laying around, so I made the first blade out of it, but it only lasted a few hours. (which I was actually surprised about...)

What would be the ideal material and heat treatment to make a tough and durable blade. It measures 18" x 3" x 1/2" thick with a 30deg bevel.

Thanks in advance.

Paul

I'd go with AR plate but I would put it on the underside so the bevel is against the floor and the flat face on top. It'll self-sharpen then.
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Gallery / Motorized My Rotary Table
« Last post by snub on Today at 12:48:39 AM »
Fun little project. Belt comes off quickly for manual use.

<a href="http://www.youtube.com/watch?v=C86fwovaGgQ" target="_blank">http://www.youtube.com/watch?v=C86fwovaGgQ</a>
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CNC / Re: first cnc
« Last post by tom osselton on August 19, 2017, 09:25:37 PM »
Well it has landed but had to come down the alley on the forklift
Thats my son in the t shirt.
We cleaned any remaining chips and coolant tank then installed the conveyor.
We also were given a few soft jaws!
The motor says it is 29.5 hp at 57 amps and we would like to get a mill with about  7.5 hp so what wil I need for power a 40hp converter? 
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The Design Shop / Re: Scraper Blade Material
« Last post by sparky961 on August 19, 2017, 07:03:12 PM »
Like efrench said, I'd be leaning toward AR400 or even AR500, though I recall knowing at some point that the QT alloys are similar. It isn't definitive, but maybe helps in your search.
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Project Logs / Re: Minnie on the cheap!
« Last post by Pete W. on August 19, 2017, 05:30:28 PM »
Pete, what sort of problems am I likely to have? I would have to buy the tin, I've got aluminium.
 

Have a look here:  https://www.copper.org/resources/properties/microstructure/al_bronzes.html 

Oops, sorry, that's the wrong publication.  Still, if you Google 'Copper Development Association', there are several publications on Aluminium Bronze.  It's a bit near bed-time right now - I'll have a look for my hard copy tomorrow and post here again with the CDA publication number. 
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Project Logs / Re: Minnie on the cheap!
« Last post by krv3000 on August 19, 2017, 04:36:40 PM »
hi brill work nothing rong with things dun with watt you have at hand 
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Project Logs / Re: Minnie on the cheap!
« Last post by NormanV on August 19, 2017, 03:45:01 PM »
Some more parts, the wheel rims. I can't understand why the castings for the rear rims are so expensive (70)! They cost me next to nothing to cast them myself.
The strakes on the hind wheels were a bit tedious to make but riveting them was fun.
Also the wheel hubs and associated bits. The slots for the spokes are a bit rough, I made my own milling cutter, it didn't keep its edge, but it won't matter as the hub covers will hide it all.
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Project Logs / Re: Minnie on the cheap!
« Last post by NormanV on August 19, 2017, 03:38:18 PM »
Pete, what sort of problems am I likely to have? I would have to buy the tin, I've got aluminium.
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The Design Shop / Re: Scraper Blade Material
« Last post by mattinker on August 19, 2017, 02:22:55 PM »
A pic would have made this easier to see what your talking about, but how about a leaf from a leaf spring, you can normalise it, work it and harden and temper.

Regards, Matthew
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Project Logs / Re: Cnc minimill
« Last post by chipenter on August 19, 2017, 06:08:40 AM »
 This morning I broke the tip of a BS1 centre drill before I threw it in the bin , I looked and saw it had some rake on the futes , ground it in my engraveg relife tool and a test cut on cast brass plumbig fitting worked , nice clean lines apart from its not in the centre I am pleased with the result .
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